Initial commit

kernel/cpu/idt.c

@@ -0,0 +1,23 @@
+//
+// Created by rick on 8/18/19.
+//
+
+#include "idt.h"
+
+idt_gate_t idt[IDT_REGISTERS];
+idt_register_t idt_reg;
+
+void set_idt_gate(int n, u32 handler) {
+    idt[n].low_offset = handler & 0xffff;
+    idt[n].sel = KERNEL_CS;
+    idt[n].always0 = 0;
+    idt[n].flags = 0x8E;
+    idt[n].high_offset = handler >> 16 & 0xFFFF;
+}
+
+void set_idt() {
+    idt_reg.base = (u32) &idt;
+    idt_reg.limit = IDT_REGISTERS * sizeof(idt_gate_t) - 1;
+
+    __asm__ __volatile__("lidtl (%0)" : : "r" (&idt_reg));
+}